question to iron chelate

[Hans J]

Hi all ,

is here maybe anyboday who knows in which % I should use Iron - Chelate ( Fe-DTPA ) for spraying leaves ?
I have big Problems one some of my peonies  ..
Before some weeks I have treat they with a mix of 3 gramm Iron : 10 Liter
The result was more or less nothing ...
Now several plant friends told me I should spray the leaves ...this should be much better ...
But I cannot find a good Information about the solution

Thanks in advance
Hans

[David Nicholson]

http://www.canna-uk.com/info-courier_iron

Hans, you may find the above useful.

[Rick R.]

Are you sure it is an iron deficiency that is causing the problem, and not some other micro-nutrient that causes similar symptoms?

Instead, you might want to get a product that contains all or most of the suspect elements:

[Hans J]

David and Rick ,

thanks for your answers

David :On the Canna site I cannot find much about Fe-DTPA ...but it is very interesting

Rick : Here are some pics :
Do you think it could be another reason than iron deficiency ?

I have sent my pics to a german plant Research Institute ...and they agree with me
They tells me I should spray with the Fe- DTPA ...but not in which % ...

Hans

[David Nicholson]

https://uk.solufeed.com/media/46240/fe-11-dtpa-tds.pdf

Hans, try this, in the "Directions for Use" section.

[Hans J]

Sorry David  ...but I have 7% Fe-DTPA

Here is my product :
https://phygenera.de/Fe-DTPA-Iron-DTPA-50-g

[Maggi Young]

I would think about  4.6gms per 1000L 

 Seems odd that further details about the product are not available on the website : "The newest safety datasheets or certificate of analysis (CoA) can get requested by using our contact form. They also can be requested during the order process or directly per mail via info@dephyte.com."

 Seems unusual.

[Hans J]

Maggi ,

I have contacted the seller ...he wrote me :
"Test foliar application with a 0.5% solution (5 g per 1 liter)"

After this Information I was really unsure ...because he has suggest me for watering I should use :
3 gramm per 10 Liter

So I have asked him again - his answer was :
"yes, the concentration of foliar application is higher. This is half of the manufacturer's guide value for "insensitive" crops."

I have also asked why they have not any informations oh the Website ..

The answer was  :
"We have no dosing instructions on our website. Especially since we sell for in vitro culture. There are other concentrations used, which our customers from protocols or scientific publications."

Because I will not risk any damages on my plants I have asked here ....in hope anybody can help me with the exact dosage
( or a confirmation that 0,5 % is correct

 

[Rick R.]

I don't think there is an easy way to tell the difference between an iron deficiency and a magnesium deficiency.  The symptoms are essentially the same, since they both are affecting the chlorophyll.  Did they specifically rule out deficiencies other than iron?  Whatever it is, it must be severe to cause necrotic tissue. 

These deficiencies are not always caused by natively high pH soil.  And because of the severity that I assume has just happened this year (and not previous years), I doubt that is the underlying problem.  Sometimes the soil is too wet for too long (that changes the chemistry in the soil), or it is too compacted (that reduces the efficiency of the roots), or the plant is just growing too fast (where certain nutrients just can't be absorbed fast enough). I would not be surprised that you soil application did not work if you have any of these conditions.  At any rate, foliar application is the way to go.  The unfortunate reality, though, is that newer grow absorbs foliar applications far better than mature growth. 

I hope it works, but if not, do a broad spectrum application as I showed.

[Hans J]

Hi Rick ,

thanks for your answer .
I have a lot of similar idea's ...in case the foliar application not works I will send some soil for testing out

Best wishes
Hans